Certainty Herbicide - 1.25 oz.

$91.45

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5 out of 5 stars Rating: 4.9

10 Reviews | 44 Q&A

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Certainty Herbicide - 1.25 oz. bottle (1.25 oz)

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Certainty Herbicide - 1.25 oz.

Certainty Turf Herbicide is a selective, post-emergent herbicide that controls labeled weeds in residential and commercial turf.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

Only for use on the following warm season grass types: Bermdagrass (common or hybrid), Bahiagrass, Buffalograss, Centipedegrass, Kikuyugrass, St. Augustinegrass, Seashore paspalum, and Zoysiagrass.




Certainty Turf Herbicide controls tough weeds in residential and commercial turf.

  • In "warm" season turf, Certainty Turf Herbicide will control broadleaves, sedges and kyllinga.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

*Note: Certainty Turf Herbicide is not labeled for golf course putting greens or within 4 feet of the putting green.

Rating Snapshot

5 stars   9
4 stars   1
3 stars   0
2 stars   0
1 star   0

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Average Customer Rating
5 out of 5 stars (10)

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  • 10 of 10 people found this review helpful:

    5 of 5 stars  Kills poa annua in centipede
    By Rich in Columbia, SC on 02/22/2015
    Verified Purchase

    After fighting poa annua for the last few years it is good to find something that works. It seems expensive for such a small amount of product, but the amount used per gallon of water is so small it is cost effective. Works much better than the atrazine I used before. Great product and produced results in only 2 weeks.

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  • 6 of 8 people found this review helpful:

    5 of 5 stars  It killed Johnsongrass!
    By in Southern Illinois on 07/01/2013
    Verified Purchase

    After trying many products to kill johnsongrass, tried Certainty and in 10 days the grass was dead!

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  • 5 of 5 people found this review helpful:

    5 of 5 stars  Green Kyllinga in Florida St Augustine grass
    By Homeowner in Florida on 04/30/2014

    I applied Certainty to my St Augustine lawn in April. The St Augustine did not show any signs of stress. Kyllinga did not shrivel up and die the next day, but it did stop coming up in my lawn. I'm very satisfied. The rest of the 1.25 oz bottle should last me for years to come so it is cost effective in the long run.

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Quackgrass Dead On Arrival!
    By Ken in Indian Trail on 05/26/2016

    Used properly per instruction, quack grass started turning yellow on 3rd day, bright yellow by the 7 day, and wilting over 2 weeks out. Must use the Dyne Amic with this product. See my other review for (Drive) product. Newly planted Princess 77 lawn. Killed all the Quackgrass, the Bermuda kept smiling!

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Awesome
    By Jeff in Montgomery, Alabama on 07/07/2015

    I had a bad infestation on nutsedge and we were getting a lot of rain everyday decided to mix it up and give it a shot in front of the rain one day only three hours before receiving half an inch of rain but within 7 days the sedge is already 90% dead. Well worth the money

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  • 3 of 4 people found this review helpful:

    5 of 5 stars  The best results ever!
    By Dennis in Leland, NC on 08/08/2015
    Verified Purchase

    This stuff really works. Results are slow, 2-3 weeks, but follow directions, use a good quality surfactant, and watch weeds disappear. Even with the blistering heat from this summer, no turf damage, no discoloration- except for the dying weeds, both sedge/grasses and broadleaf! In my centipede lawn, the best results I've ever achieved.

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Expensive but works well
    By Jim in Chadds Ford, PA on 05/12/2015
    Verified Purchase

    Effective at controlling quickgrass.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Great product
    By Shareem in Fort Worth TX on 05/08/2016

    Certainty worked better than I expected . I used it to control Tall Fescue in my Bermuda during spring .It worked incredibly well ! It also destroyed crabgrass nuts edge and every other weed listed on its label growing in my yard . Buy it . You will not be disappointed .

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  • 1 of 1 people found this review helpful:

    4 of 5 stars  Good but a bit slow
    By Charles in Athens AL on 08/30/2016

    Another product, like Metsulfuron, that I use to remove cool season grasses from Bermuda, but which also works on sedges, and is similarly slow like Metsulfuron. Wait a week or two in spring and the poa will die off. Together with AmTide in the same bottle with surfactant, you can eradicate fescue and poa. When mixed with MSMA later in summer, it will really knock out dallisgrass, though you could just get rid of dallis with only MSMA. It comes with a little measuring spoon in the box to help you get the right amount per gallon of water.

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  • 5 of 5 stars  Using Certainty
    By Marilyn in Kiln, MS on 10/02/2016

    Works well in Sprayer. Expensive but if it rids yard of certain weeds, I am all for it. In the South, we really have a problem with Nutsedge.

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Most Helpful Q&A's

05/02/2013 Dean from Iowa

QControlling quackgrass in Kentucky Bluegrass
The Michigan State University extension website says "If your lawn is primarily Kentucky bluegrass, there is a selective herbicide that will remove the quackgrass without killing the rest of your lawn. This product is only available to professional lawn care operators, and they need to make two applications on a 14-day interval. The name of the product is Certainty." However, your Q&A section includes an answer that says Certainty is not "labeled for use on Kentucky Bluegrass." Can you clarify the apparent disconnect?

ASince we do not make this product we have to go by what the manufacturer supplies us with. Kentucky Bluegrass is not on the label so we have to assume it cannot be used on that type of grass. However, here is Monsanto's telephone number 800-332-3111. We recommend contacting Monsanto and speaking with the customer service agent there to verify if this product is safe for kentucky Bluegrass.

8 of 8 people found this answer helpful.
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03/16/2012 Jesse from Des Moines, Ia

QQuackgrass - Is Q4 effective at killing quackgrass?
Are there any chemicals available through your company that can eradicate quackgrass?

AQuackgrass is a grassy weed, so you need a product labeled for grassy weeds.  Certainty is our most popular product for quackgrass and other grassy weeds.

7 of 8 people found this answer helpful.
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05/12/2011 Pete

QHow soon can I re-seed after application of Certainty?
Live in MA. Have a predominantly KBG lawn, with some tall fescue creeping in places that I would like to get rid of. After application, how soon can I re-seed any bare spots or over-seed the whole lawn? Thanks!

AAccording to the product label, you should wait at least 3 weeks before re-seeding or over-seeding with Certainty.

6 of 8 people found this answer helpful.
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06/25/2010 Michael

QI am applying Certainty Herbicides and the instructions indicate I need Non-ionic surfactant. What would be an example of that?
I will be applying this to my bluegrass lawn.

AWe offer DyneAmic Surfactant on our website. DyneAmic is a high quality non-ionic surfactant that greatly enhances the effectiveness of Certainty and other herbicides and fungicides on lawns, ornamentals, trees and landscape areas. The surfactant helps penetrate the natural waxy tissue of plants.

5 of 6 people found this answer helpful.
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04/19/2012 Brian from Marysville, Oh

QHow do I kill tall fescue in a KBG lawn?
I thought I was going to be able to use Certainty to kill the tall fescue in my KBG lawn until I read the note on the label change after 2011. What is the right product to use now?

AWe do not carry a product that will take fescue out of kentucky blue grass.  Unfortunately they are so closely related that you cannot selectively remove it with any product that we are aware of.  Your best option in this scenario is to kill the fescue with a Ranger Pro (glyphosate) product and then re-seed with your KBG.

5 of 5 people found this answer helpful.
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Most Recent Customer Questions

04/19/2016 Billy from Prattville, Al

QDoes Certainty Herbicide kill burweed?

A

Yes, Certainty Herbicide is labeled to eradicate burweed. Please refer to the product label for complete mixing and application instructions.

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04/17/2016 Marcel from Gray, La

QWill Certainty Herbicide kill virginia buttonweed?

A

Certainty Herbicide is labeled for suppression of virginia button weed. Per the product label: For suppression of buttonweed apply this product at the rate of 1.25 ounces per acre. This application will provide suppression or control of buttonweed for 4-6 weeks. To ensure control, tank mix with a broadleaf herbicide labeled for control of virginia buttonweed.†

Another product we carry that will control virginia buttonweed is Fertilome Weed Free Zone. Apply the weed free zone at the rate of†1.5 oz - 2 oz. per gallon of water per 1,000 sq. ft†

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04/13/2016 Sean from Wilmington

QHow many oz per gallon at 2 gallon per minute of Certainty Herbicide do I use for nutsedge control?
Mixed with MSM

A

Per the Certainty Herbicideproduct label you would apply 1.25 fl oz per acre so it would be 5 (0.16 g) small scoops (or 1 large 0.8 g) per 2 gallons per 1000 sq ft. †Add 2 tsp (1/3 fl oz) of non ionic surfactant per gallon of water.

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04/13/2016 Deb from Central City, Nebraska

QCan I use Certainty herbicide on a buffalo grass lawn?

A

Certainty will not harm established Buffalo grass when applied as directed.†

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03/26/2016 Mark from Brownsville, Tn

QCan I spray Certainty Herbicide during Spring green up?
I have a mix of common and hybrid Bermuda. I'm spraying mostly for white clover and henbit.

A

Certainty Herbicide can be used anytime weeds are actively growing and should not harm the Bermuda when used as directed on the product label.

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03/24/2016 Carl from Georgia

QWhat is the Certainty mixing instructions per 1 gallon or 2 gallon of water?
Most of the mixing instructions you have provided to customers here say X number of small or large scoops per gallon. When clearly the directions state per 2 gallons vol of water. Please explain. I don't want to be putting the product out too week of course :)

A

The small scoop for Certainty is .16grams and the large .8grams. Depending on what you are treating for and what type of turf you are treating for would make the difference in how many scoops you would use per gallon water. On page 2 of the Product label†you will find the mix chart.†

1 of 2 people found this answer helpful.
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03/21/2016 Jesus from Katy, Texas

QWhat is the rate to kill nutsedge in St. Augustine grass?
What is the rate to kill Nutsedge in St. Augustine grass? (1 Gallon sprayer).

A

The mixing ratio of Certainty Herbicide is 3 - 5 small scoops or 1 - 2 large scoops per gallon of water per 1,000 sq ft.

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03/11/2016 Jean from Kennedale, Tx

QIs Certainty Herbicide safe to use around pets?

A

Certainty Herbicide is safe to use around pets as long as it is used according to the directions on the product label.† You do want to keep pets and people out of the area while the product is being applied and until it is completely dry.† Once everything is dry, it is fine for everyone to return to the area.†

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03/01/2016 Jeff from Huntersville, Nc

QCan I use Certainty Herbicide to kill Poa Annua in Fescue in NC?
Bought a house that has mostly fescue grass in descent shape. However there is enough poa to be concerned about spreading. I've ready of good luck with products but often that kill Fescue as well. Any recommendations? Thanks.

A

Certainty Herbicide is not labeled to treat Poa Annua and will kill your Fescue lawn. Instead, you could use†Bensumec 4LF on Fescue turf.†Bensumec 4LF is a pre-emergent broadleaf herbicide that provides season-long control of broadleaf weeds in all major turf grasses, including Fescue.†

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10/13/2015 Bob from Elkhorn

QWill Certainty kill tall fescue?

A

Yes, Certainty is labeled to target Tall Fescue applying at a rate of 3 - 5 small scoops or 1 - 2 large scoops per gallon of water per 1,000 sq ft.

1 of 1 people found this answer helpful.
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See all 44 questions »


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